A Republican campaign aide said Friday on "Fox & Friends" she was "terrified" when a Democratic operative physically confronted her at a campaign rally in Nevada.

Kristin Davison, campaign manager for Republican gubernatorial candidate Adam Laxalt, said after a campaign rally Tuesday night in Las Vegas she was confronted aggressively by a "very large gentleman."

Davison said the man was shouting at Laxalt, "shoving" his phone into their faces and bumping into staffers as he chased after them.

"We entered a private room [and] this gentleman pushed his way through the door. I got trapped between the door and the wall, and had this gentleman kind of put my arm behind my back and he held on to it and just kept pushing and screaming at our candidate," said Davison, who provided photos of bruises left on her arm.

The attacker was arrested by police and later identified as Wilfred Michael Stark III, 50, reportedly an operative for American Bridge 21st Century.

The group was founded by liberal activist David Brock and backed financially by billionaire George Soros.

Davison said Stark was acting as a "tracker," attempting to shout questions to Laxalt while recording with his phone. Davison said normally such "trackers" are respectful, but Stark acted in a "scary, disturbing" manner.

At one point, she said Stark had a hold of her arm and she could not get away as he yelled at her and Laxalt.

"That’s when I really felt terrified. I couldn’t get away because when I tried to get a away, my arm was stuck behind my back and I kept yelling 'help me, stop' and he wouldn’t stop," she recalled.

She said Stark eventually yelled at Laxalt, "you can make this stop" if he answered questions. Davison said she later found out that Stark was arrested previously for shoving someone to the ground.

"It is very, very disappointing that he would be encouraged and paid to do this," said Davison.

A spokesman for American Bridge did not respond to Fox News’ request for comment Thursday. It's not clear whether he was on the job for American Bridge during the confrontation, but he works for the group, listing himself as a reporter for them on his LinkedIn page.

Laxalt's opponent Steve Sisolak (D) and state party officials denied any connection to Stark.